US4183759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable compositions
Assignee: White Sea and Baltic Co Ltd
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Filing: 1978-04-03
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Granted: 1980-01-15
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Expires: 1998-04-03
Abstract
Abstract Particulate refractory material is formed into a mould or core and bonded with a binder including a polymeric carboxylic acid, a particulate inorganic material that will react with this to form a cement, water, and one or more of tartaric acid, phosphoric acid and fused particulate magnesia.
Inventors
- 👤 David Epstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:38
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167; C; C04; C04B; C04B28/00; C04B28/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 words
A method of making a foundry mould or core comprising shaping a mix of a particulate inert refractory material and a binder and allowing the mix to cure in which the binder comprises (a) a water soluble acid component comprising a polymeric carboxylic acid (b) an aluminosilicate glass reactive with the polymeric carboxylic acid to form a cement, (c) water in an amount of below 5% the total weight of the mix and (d) at least one modifier selected from the group consisting of tartaric acid and phosphoric acid, each modifier being present in an amount of at least 25% by weight based on the weight of polymeric carboxylic acid.
Claim 2
Independent Claim
110 words
A method of making a foundry mould or core comprising shaping a mix of a particulate inert refractory material and a binder and allowing the mix to cure in which the binder comprises (a) a water soluble acid component comprising a polymeric carboxylic acid (b) an aluminosilicate glass reactive with the polymeric carboxylic acid to form a cement, (c) water in an amount of below 5% the total weight of the mix and (d) at least one modifier selected from the group consisting of tartaric acid and phosphoric acid, each modifier being present in an amount of at least 25% by weight based on the weight of polymeric carboxylic acid.
Claim 3
Dependent Claim
17 words
A method according to claim 1 in which the polymeric carboxylic acid is an acrylic acid polymer.
Claim 4
Dependent Claim
18 words
A method according to claim 1 in which the polymeric carboxylic acid is a homopolymer of acrylic acid.
Claim 5
Dependent Claim
29 words
A method according to claim 1 in which the binder includes tartaric acid in an amount of at least 50% by weight based on the weight of polycarboxylic acid.
Claim 6
Dependent Claim
17 words
A method according to claim 4 in which the amount of tartaric acid is 100 to 400%.
Claim 7
Dependent Claim
29 words
A method according to claim 1 in which the binder includes phosphoric acid in an amount of at least 33% by weight based on the weight of polycarboxylic acid.
Claim 8
Dependent Claim
17 words
A method according to claim 6 in which the amount of phosphoric acid is 50 to 300%.
Claim 9
Dependent Claim
17 words
A method according to claim 1 in which the binder includes both tartaric acid and phosphoric acid.
Claim 10
Dependent Claim
14 words
A method according to claim 1 in which the glass comprises a fluoroaluminosilicate glass.
Claim 11
Dependent Claim
30 words
A method according to claim 1 in which the binder includes particulate fused magnesia in an amount of 10 to 100% based on the weight of inorganic particulate reactive material.
Claim 12
Dependent Claim
17 words
A method according to claim 1 in which the amount of water is from 0.5 to 3%.
Claim 13
Dependent Claim
35 words
A method according to claim 1 in which the total amount of water included in the mix is sufficient to yield an aqueous solution of polymeric carboxylic acid containing 15 to 35% polymeric carboxylic acid.
Claim 14
Dependent Claim
131 words
In a hardenable foundry composition that can be formed into the shape of a foundry core or mould and hardened, comprising an inert particulate refractory material selected from refractory oxides and silicates and binder ingredients that react to form a cured binder that hardens the composition, the improvement which consists of the use as binder ingredients of a particulate aluminosilicate glass and an aqueous solution of a polymer of acrylic acid that will leach cations from the glass to form the reacted binders, and in which the amount of the said binder ingredients is from 1 to 10% by weight of the composition and in which the binder ingredients include also particulate fused magnesia in an amount of at least 50% by weight based on the weight of polymeric carboxylic acid.
Claim 15
Dependent Claim
131 words
In a hardenable foundry composition that can be formed into the shape of a foundry core or mould and hardened, comprising an inert particulate refractory material selected from refractory oxides and silicates and binder ingredients that react to form a cured binder that hardens the composition, the improvement which consists of the use as binder ingredients of a particulate aluminosilicate glass and an aqueous solution of a polymer of acrylic acid that will leach cations from the glass to form the reacted binders, and in which the amount of the said binder ingredients is from 1 to 10% by weight of the composition and in which the binder ingredients include also particulate fused magnesia in an amount of at least 50% by weight based on the weight of polymeric carboxylic acid.
Claim 16
Dependent Claim
147 words
In a hardenable foundry composition that can be formed into the shape of a foundry core or mould and hardened, comprising an inert particulate refractory material selected from refractory oxides and silicates and binder ingredients that react to form a cured binder that hardens the composition, the improvement which consists of the use as binder ingredients of a particulate aluminosilicate glass and an aqueous solution of a polymer of acrylic acid that will leach cations from the glass to form the reacted binder, and in which the amount of the said binder ingredients is from 1 to 10% by weight of the composition and in which the binder ingredients include also at least one modifier selected from the group consisting of tartaric acid and phosphoric acid, each modifier being present in an amount of at least 50% by weight based on the weight of polymeric carboxylic acid.
Claim 17
Dependent Claim
147 words
In a hardenable foundry composition that can be formed into the shape of a foundry core or mould and hardened, comprising an inert particulate refractory material selected from refractory oxides and silicates and binder ingredients that react to form a cured binder that hardens the composition, the improvement which consists of the use as binder ingredients of a particulate aluminosilicate glass and an aqueous solution of a polymer of acrylic acid that will leach cations from the glass to form the reacted binder, and in which the amount of the said binder ingredients is from 1 to 10% by weight of the composition and in which the binder ingredients include also at least one modifier selected from the group consisting of tartaric acid and phosphoric acid, each modifier being present in an amount of at least 50% by weight based on the weight of polymeric carboxylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |